| 摘要 |
PURPOSE:To provide a device which is not affected by a data pattern and generates a stable clock even for a differentiation detection signal and suits to IC-implementation as to a timing regenerating device which detects a bit phase from a digital regenerated signal. CONSTITUTION:A phase comparator as a constituent element of the timing regenerating device consists of a T/2 edge pulse generating circuit 14 (24), an edge trigger RS-FF 15 (25), and an arithmetic circuit 16 (26) and generates an error signal corresponding to time differences only between respective edges of input data and edges of a clock generated by a voltage-controlled oscillator 9. For a signal as an object of PR(1, 0, -1) detection, two comparing circuits 13 and 23 detect edge data and compare their phases with a clock separately and an adding circuit 18 adds the phase errors, so that the accurate clock is generated without being affected by the data pattern. |
